bmp图像的读取

[DustLand]

准备：我现在已经按照bmp图的格式读出来了，已经取得数据区各个像素点的值，把调色板的数据也读出来了。
问题：我如何把图显示出来呢？1.再建个窗体，用gdi+画出来？2.还是什么别的方便的方法。。。。
PS：我知道image控件能够直接显示bmp，我想自己写一个显示的。谢谢大家~~~~

[threenewbee]

PictureBox1.Image = New BitMap("c:\\1.bmp");

[wenbin]

使用API自己绘上去。具体API记不起。查下就好

为什么要自己绘图呢
使用控件不好吗？

[DustLand]

[Quote=引用 2 楼 wodegege10 的回复:]
使用API自己绘上去。具体API记不起。查下就好

为什么要自己绘图呢
使用控件不好吗？
[/Quote]
因为老师说让熟悉bmp的格式。。。啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊。。。

[wenbin]

重写窗体的Paint方法
e.Graphics.DrawImage(_editorImage, new Rectangle(0, 0, width, height));

[wuyq11]

public static Bitmap CreateBitmap(byte[] originalImageData, int originalWidth, int originalHeight)
{
Bitmap resultBitmap = new Bitmap(originalWidth, originalHeight, System.Drawing.Imaging.PixelFormat.Format8bppIndexed);
MemoryStream curImageStream = new MemoryStream();
resultBitmap.Save(curImageStream, System.Drawing.Imaging.ImageFormat.Bmp);
curImageStream.Flush();
int curPadNum = ((originalWidth * 8 + 31) / 32 * 4) - originalWidth;
int bitmapDataSize = ((originalWidth * 8 + 31) / 32 * 4) * originalHeight;
int dataOffset = ReadData(curImageStream, 10, 4);
int paletteStart = 54;
int paletteEnd = dataOffset;
int color = 0;
for (int i = paletteStart; i < paletteEnd; i += 4)
{
byte[] tempColor = new byte[4];
tempColor[0] = (byte)color;
tempColor[1] = (byte)color;
tempColor[2] = (byte)color;
tempColor[3] = (byte)0;
color++;
curImageStream.Position = i;
curImageStream.Write(tempColor, 0, 4);
}
byte[] destImageData = new byte[bitmapDataSize];
int destWidth = originalWidth + curPadNum;
for (int originalRowIndex = originalHeight - 1; originalRowIndex >= 0; originalRowIndex--)
{
int destRowIndex = originalHeight - originalRowIndex - 1;
for (int dataIndex = 0; dataIndex < originalWidth; dataIndex++)
{
destImageData[destRowIndex * destWidth + dataIndex] = originalImageData[originalRowIndex * originalWidth + dataIndex];
}
}
curImageStream.Position = dataOffset;
curImageStream.Write(destImageData, 0, bitmapDataSize);
curImageStream.Flush();
resultBitmap = new Bitmap(curImageStream);
return resultBitmap;
}

[DustLand]

[Quote=引用 4 楼 wodegege10 的回复:]
重写窗体的Paint方法
e.Graphics.DrawImage(_editorImage, new Rectangle(0, 0, width, height));
[/Quote]
谢谢，我先这么写着~~~~~~~

[DustLand]

[Quote=引用 5 楼 wuyq11 的回复:]
public static Bitmap CreateBitmap(byte[] originalImageData, int originalWidth, int originalHeight)
        {
            Bitmap resultBitmap = new Bitmap(originalWidth, originalHeight, System.Drawing.Imaging.PixelFormat.Format8bppIndexed);
            MemoryStream curImageStream = new MemoryStream();
          resultBitmap.Save(curImageStream, System.Drawing.Imaging.ImageFormat.Bmp);
          curImageStream.Flush();
            int curPadNum = ((originalWidth * 8 + 31) / 32 * 4) - originalWidth;
            int bitmapDataSize = ((originalWidth * 8 + 31) / 32 * 4) * originalHeight;
            int dataOffset = ReadData(curImageStream, 10, 4);
            int paletteStart = 54;
            int paletteEnd = dataOffset;
            int color = 0;
            for (int i = paletteStart; i < paletteEnd; i += 4)
            {
                byte[] tempColor = new byte[4];
                tempColor[0] = (byte)color;
                tempColor[1] = (byte)color;
                tempColor[2] = (byte)color;
                tempColor[3] = (byte)0;
                color++;
                curImageStream.Position = i;
                curImageStream.Write(tempColor, 0, 4);
            }
            byte[] destImageData = new byte[bitmapDataSize];
          int destWidth = originalWidth + curPadNum;
            for (int originalRowIndex = originalHeight - 1; originalRowIndex >= 0; originalRowIndex--)
            {
                int destRowIndex = originalHeight - originalRowIndex - 1;
                for (int dataIndex = 0; dataIndex < originalWidth; dataIndex++)
                {
                    destImageData[destRowIndex * destWidth + dataIndex] = originalImageData[originalRowIndex * originalWidth + dataIndex];
                }
            } 
            curImageStream.Position = dataOffset;
            curImageStream.Write(destImageData, 0, bitmapDataSize);
          curImageStream.Flush();
            resultBitmap = new Bitmap(curImageStream);
            return resultBitmap;
        }


[/Quote]

恩，这个好，收藏了~~~

[on_way_]

学习一下